9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
Periodic misfire in cylinder 1 or 2 code P1312.
Replaced plugs and cleared code, still comes up periodically.
Bought NEW OEM ignition coil off rockauto. I swapped with one of the cylinders and engine sounded terrible, shaky, only 3 cylinders firing. Pulled out coil and put in an extra spark...